[Radiation dose intensification for glioblastoma]
A Laprie1, F Tensaouti1, E Cohen-Jonathan Moyal2
1Département d'oncologie radiothérapie, institut universitaire du cancer de Toulouse-Oncopole, 1, avenue Irène-Joliot-Curie, 31059 Toulouse cedex, France; Inserm Toulouse neuroimaging center (Tonic), place Baylac, 31000 Toulouse, France.
Summary
Glioblastoma treatment faces radioresistance, leading to local relapse in 95% of cases. This study explores overcoming radioresistance using dose escalation and advanced imaging techniques like magnetic resonance imaging (MRI) and positron emission tomography (PET).
Area of Science:
- Neuro-oncology
- Radiation Oncology
- Medical Imaging
Background:
- Glioblastoma is the most prevalent adult brain tumor.
- Standard treatment involves surgery and radio-chemotherapy.
- Radiotherapy resistance leads to local relapse in 95% of glioblastoma cases.
Purpose of the Study:
- To review current strategies for overcoming glioblastoma radioresistance.
- To discuss dose escalation and imaging-guided radiotherapy techniques.
- To present findings from prospective trials, including SPECTRO-GLIO.
Main Methods:
- Dose escalation strategies.
- Metabolic and functional imaging (dose-painting) for radiotherapy guidance.
- Prospective clinical trials, including the French phase III SPECTRO-GLIO trial.
- Use of advanced MRI (spectrometric, diffusion, perfusion) and PET markers.
Main Results:
- Radiotherapy improves survival but radioresistance remains a challenge.
- Dose escalation and imaging-guided approaches show promise in overcoming resistance.
- Ongoing trials are evaluating the efficacy of these advanced techniques.
Conclusions:
- Advanced imaging and dose escalation are key to improving glioblastoma treatment outcomes.
- Targeted radiotherapy guided by functional imaging may reduce local relapse rates.
- Further research and clinical trials are essential to optimize these novel therapeutic strategies.
